Evaluación de dos métodos de extracción de ruda, ortiga y ajo para el control de Brevicoryne brassicae (pulgón) en el cultivo de col morada (Brassicacea oleracea var. capitata f. rubra)

Abstract

Purple cabbage (Brassicacea oleracea var. Capitata f. rubra)" is a vegetable of great economic interest due to its high production and market demand, however, in order to have a good production, it has been necessary to use conventional agrochemicals to reduce pathogens, and the indiscriminate use of these products has caused problems to the environment and human health. The present investigation was carried out in the Huachi San Francisco sector and its objective was to evaluate the effect of two extraction methods for aphid control. The factors studied were; infusion method (M1) with three application doses D1 (8 ml/L), D2 (12 ml/L) and D3 (16 ml/L) and maceration (M2) with doses of D1 (0.5 L), D2 (1 L) and D3 (1.5 L) with an application frequency of 6 and 15 days after transplanting. A split-plot design with 3 replications was used, where the large plot corresponds to the methods and the sub-plots to the doses. A hierarchical analysis was performed for the results because the doses of the extracts applied were different from each other. The variables evaluated were: incidence, severity, days to aphid appearance and percentage of aphids present on the upper and lower side of the leaf, however, statistically none of the applied doses and methods had significant differences, considering that this depends on many climatic factors such as the relatively low temperature and humidity that occurred during the months of the research, so it is understood that they were not the most appropriate, greatly influencing the adaptation and development of the aphids and in the same way in the application of the extracts.